New ZOOM option "step" which specifies number of records to be
retrieved in one chunk. Used in conjunction with "start" and "count".
-SRW support for yaz-client.
+SRW support for yaz-client. Use scheme http: to use it, e.g.
+ http://host:port/db
yaz-client no longer does (un)intelligent character set conversions
by default. Can be enabled with charset and marc_charset commands.